An enormous firework display marked the beginning of 2013 for over 250,000 people in central London.
The 11-minute show lit-up the Thames and was followed by the traditional counting down by Big Ben.
In Russia, spectators filled Moscow's Red Square as St. Basil's Cathedral and the Kremlin provided a picturesque backdrop for a fireworks display.
The dazzling show was marred though after about 25 people were arrested for trying to hold an unsanctioned protest.
Firework displays also greeted spectators in Amsterdam, Stockholm, Belgrade and Copenhagen.
2012 was a tough year for some nations economically and New Year's celebrations suffered as a result.
In Cyprus, officials in the capital Nicosia decided to cancel festivities in light of the economic crisis.
The city said it saved 16,000 euros ($20,000 CDN) from the cancelled event and will instead spend the money on some 320 needy schoolchildren.
Paris is known as the "City of Lights" but this year's show was not as big as previous years.
Energy austerity measure across France led authorities to ban all fireworks for the night.
Celebrations in Madrid went on without a hitch but more than 22,000 revellers brought in the new year with umbrellas as rain fell steadily.